EXPLAIN ME WHY

diyosa199

WHO IS MUCH HEAVIER ? A SMALL COIN OR A NEWLY BUILT CARGO SHIP ?
IF YOUR ANSWER IS THE SHIP THEN WHY A SMALL COIN SINK UNDER WATER BUT THE NEWLY BUILT CARGO SHIP DOES NOT?

Tyaestysu

diyosa199 physics of water tension

the_guy545

diyosa199 The coin is a completely solid object, with no way of allowing air into it. The air inside of a ships allows it to become buoyant. It is also due to the shape of the object. A boat is created to cut through the water and lay on top of it, while a coin is created with making profits in mind, not floating on the water.

Al1ce

diyosa199
BECAUSE PHYSICS

Canoneer

diyosa199 The coin has a higher mass to volume ratio.

Mc2

diyosa199 Answer is 42.

Legion

diyosa199 Physics. And engineering, just for Howard Wolovitz

ooouuuuuii

diyosa199 Warning: Long explanation below

The density of water is 1 gram for every cubic centimeter. Boats are not only large, they also contain air. This combination of air and steel is less dense than water, causing it to float. Coins do not have air in them, which usually makes them heavier. However, they rely on surface tension to float. Most coins break the tension because they are too heavy.

Another thing is that when something sinks into water, it displaces it, causing the water level to rise. Boats have taller rims so water doesn't get into it. However, coins typically become covered in water, which weighs them down further. This is also why boats float, but bars of steel won't.

Fun fact: If you have a 1 yen coin and enough patience, you can place it on water so that it doesn't break the surface tension

jbox1

diyosa199 You see, the ship, although heavier, is less dense (mass per area) than the coin because it is full of air on the inside, while a coin is solid metal. Therefore, the area in which a coin displaces (takes up) is not enough to overcome its own weight, and therefore sinks. However, a ship is full of air on the inside, and since it is so large, it can easily push against the water and overcome its weight.

Tyaestysu

Tyaestysu and a coin ad no way to float as its a naturaly sinking metal withe no boyant shape

QuantumRK

Mc2 last time i checked it was "boop"

ProntoManagement

Well nobody stated the size of the cargo ship. So I'm going with the coin. As I feel the cargo ship is a tiny twig.

TurboTwinky28

In order for an object to float, it must have less overall density than water and must weigh less than the amount of water displaced. A penny, for example, is usually made of copper. copper has a density of about 8.94g/cm^3. water has a density of 1g/cm^3. So a penny is heavier than water. pennies also weigh much more than the water they displace, which is a tiny amount. which is why they sink, and rather quickly.

Boats, although made of metal, are (as mentioned by other forum members) less dense because they contain a lot of air. boats, especially bigger ones, cover a larger area and thus spreads out their weight and lowers their density even more. also, boats displace less water than you'd think. When you see a ship in a dry dock, that red/blue/white area at the bottom indicates the portion of the ship under water and thus the water that is displaced. If you look at a picture of just about any large ship, that portion is relatively small in comparison to the rest of the ship

I think I got those points correct, but correct me if I'm wrong. I'm not an expert